void printf(char* str)
{
    unsigned short* VideoMemory = (unsigned short*)0xb8000;
    for(int i = 0;str[i];++i)
    {
        VideoMemory[i] = (VideoMemory[i] & 0xFF00) | str[i];
    }
}

void kernelMain(void* multiboot_structure,unsigned int magicnumber)
{
    printf("Hello World!");
    while(1);
}